66997027033 has 2 divisors, whose sum is σ = 66997027034. Its totient is φ = 66997027032.

The previous prime is 66997026977. The next prime is 66997027039. The reversal of 66997027033 is 33072079966.

66997027033 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 58858641664 + 8138385369 = 242608^2 + 90213^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66997027033 is a prime.

It is not a weakly prime, because it can be changed into another prime (66997027039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33498513516 + 33498513517.

It is an arithmetic number, because the mean of its divisors is an integer number (33498513517).

Almost surely, 2^66997027033 is an apocalyptic number.

It is an amenable number.

66997027033 is a deficient number, since it is larger than the sum of its proper divisors (1).

66997027033 is an equidigital number, since it uses as much as digits as its factorization.

66997027033 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2571912, while the sum is 52.

The spelling of 66997027033 in words is "sixty-six billion, nine hundred ninety-seven million, twenty-seven thousand, thirty-three".